[18:40:02] [Chunk Render Task Executor #2/ERROR] [me.je.mo.so.cl.ut.NativeBuffer/]: EMERGENCY: Tried to allocate 70400 bytes but the allocator reports failure
[18:40:02] [Chunk Render Task Executor #2/ERROR] [me.je.mo.so.cl.ut.NativeBuffer/]: EMERGENCY: ... Attempting to force a garbage collection cycle (attempt 1/3)

hs_err_pid18140.log

This doesn't look like an Embeddium issue - it's Java itself reporting that it ran out of memory to do something. Try reducing your heap size.